JPH0649942Y2 - Electromagnetic clutch damper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of an electromagnetic clutch damper that functions as a type of vibration absorbing device.

[Conventional technology]

Conventionally, as shown in FIG. 4, an inner case (1) having a plurality of outward flanges (2) radially protruding outward and a plurality of inward flanges (4) radially protruding inwardly are provided. An electromagnetic clutch damper in which the outer case (3) is concentrically arranged, and the outward flanges (2) and the inward flanges (4) alternately arranged in the circumferential direction are connected via an elastic member (5) made of a rubber-like elastic material. It has been known.

In this conventional electromagnetic clutch damper, the elastic members (5) arranged in the circumferential direction are provided at eight convenient positions as shown in the figure, and as shown in FIG. 6, both flanges (2) are provided.
It is vulcanized and adhered to (4) in a solid state.
In the intermediate space between the inner case (1) and the outer case (3), except for the interposition of each elastic member (5), there is a cavity that penetrates the damper in the axial direction. A thin film burr (6) is left at a position corresponding to the parting surface of the vulcanization mold (5th
See figure). However, this burr (6) does not affect the function of the damper in any way.
The existence of can ignore this.

[Problems to be solved by the invention]

The conventional electromagnetic clutch damper described above includes an inner case (1) and an outer case (3) and a plurality of elastic members (5).
It can be said that the elastic member (5) is connected in an extremely close state, but the elastic constant of the elastic member (5) increases along with this, and the operating voltage of the electromagnetic clutch tends to increase. If the spring constant in the axial direction is reduced to lower the spring constant, the spring constant in the torsion direction is also reduced, and there is a problem that the durability of the elastic member (5) is significantly deteriorated.

[Means for solving problems]

In view of the above points, the present invention has been made for the purpose of both lowering the operating voltage and maintaining the durability of the elastic member at a satisfactory level. An inner case having a plurality of outward flanges projecting outwardly and an outer case having a plurality of inward flanges projecting radially inwardly are concentrically arranged, and the outward flanges and the inward direction are alternately arranged in the circumferential direction. In an electromagnetic clutch damper in which flanges are connected via a first elastic member, a second elastic member that is not adhered to the first elastic member is provided between the outward flange and the inward flange. When both the cases are relatively displaced in the torsional direction, the elastic members receive a load, and when the cases are relatively displaced in the axial direction, only the first elastic member receives the load. It was.

[Action]

In the electromagnetic clutch damper of the present invention having the above configuration, the second elastic member that is not adhered to the first elastic member is provided between the outward flange and the inward flange.
When both cases are relatively displaced in the torsional direction, both elastic members receive a load, and when both cases are relatively displaced in the axial direction, only the first elastic member receives a load. It is possible to set the spring constant in the torsional direction to a certain high value, and it is possible to suppress the spring constant in the axial direction to a low value.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

1 to 3, parts having the same configurations as those of the dampers shown in FIGS. 5 to 7 according to the conventional example are designated by the same reference numerals and the description thereof will be omitted.

That is, in the electromagnetic clutch damper, in comparison with the above-described conventional example, a rubber-like elastic material that connects the outward flange (2) of the inner case (1) and the inward flange (4) of the outer case (3) is used. Each of the first elastic members (5) is provided with a hole (5a) penetrating in the axial direction, and the second elastic member (7) made of a rubber-like elastic material and having a substantially columnar shape is provided in the hole (5a). Is slidably inserted into the first elastic member (5) in a non-bonded state, and when a load is applied to both elastic members (5) and (7) in the torsional direction, The elastic member (7) of the first elastic member (5)
However, when a load is input in the axial direction, that is, when both cases (1) and (3) are displaced relative to each other in the axial direction, they are vulcanized and bonded to both cases (1) and (3). Only one elastic member (5) elastically deforms, and the non-bonded second elastic member (7) slides relatively to the first elastic member (5) and hardly elastically deforms. The spring constant in the torsional direction can be set high, and the spring constant in the axial direction can be set low.

The material and hardness of the second elastic member (7) are not particularly limited, including that they are the same as those of the first elastic member (5). When the hardness is set to a high hardness, both spring constants are further separated, and a remarkable effect is achieved. Further, the shape, size, number, and attachment position of the second elastic members (7) are not limited at all, and it is conceivable that a plurality of kinds including the hardness may be used in combination. Also, to prevent the second elastic member (7) from coming out of the hole (5a),
It is also effective to attach a retaining means as appropriate.

[Effect of device]

 The present invention has the following effects.

That is, between the outward flange and the inward flange, a second elastic member that is not adhered to the first elastic member is provided in addition to the first elastic member that connects both flanges. Since both elastic members receive a load when they are relatively displaced in the torsional direction, and only the first elastic member receives a load when both cases are relatively displaced in the axial direction, the torsion of the elastic members It is possible to set the spring constant in the direction to a certain high value and the spring constant in the axial direction to a low value. Therefore, according to the present invention, the spring constant in the torsional direction of the elastic member can be set high to enhance the durability of the elastic member, and the spring constant in the axial direction can be kept low to lower the operating voltage of the electromagnetic clutch.

[Brief description of drawings]

1 is a front view of an electromagnetic clutch damper according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG.
1 is a sectional view taken along line III-III in FIG. 1, FIG. 4 is a front view of an electromagnetic clutch damper according to a conventional example, FIG. 5 is a sectional view taken along line VI-VI in FIG. 4, and FIG. 6 is FIG. VII-VII in
It is a line sectional view. (1) Inner case, (2) Outward flange, (3) Outer case (4) Inward flange, (5) First elastic member, (5a)
Hole, (7) second elastic member

Claims (1)

[Scope of utility model registration request] 1. An inner case (1) having a plurality of radially outwardly projecting flanges (2) and an outer case (3) having a plurality of radially inwardly projecting inward flanges (4). In the electromagnetic clutch damper, wherein the outward flanges (2) and the inward flanges (4) arranged concentrically and arranged alternately in the circumferential direction are connected via a first elastic member (5), the outward flanges ( A second elastic member (7) that is not adhered to the first elastic member (5) is provided between the second elastic member (2) and the inward flange (4), and both cases (1) and (3) are twisted. When the elastic members (5) and (7) receive a load when they are relatively displaced in the direction,
An electromagnetic clutch damper, wherein only the first elastic member (5) receives a load when (3) is relatively displaced in the axial direction.